Comments: MAX30105 Particle and Pulse Ox Sensor Hookup Guide
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The heart rate sensor is not working accurately at all. It just seems to give random values for about 45 seconds then switches to other random values.
Heart rate sketch works but the SP02 is not getting valid responses.
That library relies on the SPO2 algorithm that we use from Maxim. Unfortunately, we don't really know exactly how it works (beyond the sensor measures changes in light absorption due to oxygenated blood). In my experience, the SPO2 readings can be inconsistent, but the heart rate readings should be pretty accurate.